need help and shown what direction i need to go with this desktop, im a noob and any help is apreciated, i really want to game with it ,current specs is :CPU, Intel G840 2.8Ghz SandybridgeMotherboard:GIGABYTE G61Memory:4G 1333MhzHD:WD 500G BlueGraphics:Nv630 1G Graphic MemoryPSU:400W